A Minimum-Impact Method for Measuring Corrosion Rate of Steel-Hulled Shipwrecks in Seawater

Current research on USS Arizona is focused on a minimum-impact technique for calculating corrosion rate of the battleship's steel hull by analysing physical and chemical properties of marine encrustation covering the exposed hull. An equation is derived that allows concretion thickness, density, and total iron content to be used to calculate corrosion rate of steel hull plate.
© 2006 The Authors     

Not My Taxes! Explaining Tax Resistance and its Implications for Australia's Welfare State

In discussing Australia's need to increase taxes to pay for future social security, Michael Keating worries that voters see taxes as a ‘burden’ and that ‘the link between taxation and citizenship has been broken’. This paper deals with the problem of tax resistance (preferring lower taxes even when tax cuts risk public services) for Australia's welfare state. First, I describe how two Australian fiscal institutions—a residual welfare system and visible income taxes—promote tax resistance among voters. Second, I draw on these insights to develop several explanations for tax resistance: voter self-interest, voter hostility to minorities, voter disengagement (low trust and lack of interest in politics), and individualistic attitudes. The main conclusion is that tax resistance in Australia is institutionalised, making it easier to mobilise interests around low taxes, and harder to advocate for alternatives. Results of multivariate analysis using AES 2004 data indicate that an ‘anti-tax coalition’ can build on three diverse publics; one of higher and middle-income earners attuned to self-interest, another hostile to welfare beneficiaries, and another ‘tuned out’ of politics and willing to support any call for tax cuts. Inevitably, the debate about the welfare state is shadowed by a debate about voter willingness to pay taxes that finance it.     

Optimal Sampling Design for Variables with Varying Spatial Importance

It is often desirable to sample in those locations where uncertainty associated with a variable is highest. However, the importance of knowing the variable's value may vary across space. We are interested in the spatial distribution of Received Signal Strength Indicator (RSSI), a measure of the signal strength from a cell tower received at a particular location. It is crucial to estimate RSSI values accurately in order to evaluate the effectiveness of mayday systems designed for rapid emergency notification following vehicle crashes. RSSI estimation is less important for locations where the probability of a crash is low and where the likelihood of call completion is either close to zero or one. We develop a method for augmenting an initial spatial sample of RSSI values to achieve a high‐precision estimate of the probability of call completion following a crash. We illustrate the approach using data on RSSI and vehicle crashes in Erie County, NY.     

Unions et désunions monétaires en Europe du Gold Standard au Système Monétaire Européen

La naissance de la Banque centrale européenne a suscité une discussion soutenue à propos des critères de convergence, de l'objectif d'inflation et de la flexibilitédes taux de change de l'euro par rapport aux autres monnaies-clés (dollar, yen). Un détour par les arrangements et unions/désunions monétaires passés s'avère pertinent en termes d'information à propos des conditions essentielles pour l'établissement et la gestion des politiques monétaires, non seulement du point de vue économique mais également du point de vue politique. Les lec¸ons principales qu'apporte l'Histoire indiquent que: inflation et taux de change constituent deux 'ancres', parmi d'autres, choisies en fonction d'une orientation idéologique plus marquée qu'il n'apparâ L t au premier abord; qu'àla fois les créditeurs et les débiteurs nets doivent être responsabilisés pour organiser un système durable; que l'intégration du marchéa toujours précédél'union monétaire; enfin, qu'un lien solide entre pays apporte une meilleure protection contre les chocs extérieurs qu'un ensemble de réactions individuelles non coordonnées. Néanmoins, une question importante reste en suspens: est-il possible pour une union monétaire de supporter la présence de parasites monétaires dans sa périphérie, hôtes indésirables qui ne participent pas au partage des coûts engendrés par l'union monétaire, mais qui s'invitent au sein du système et en profitent àtravers des alignements tacites sur la politique appliquée àla monnaie unique?     

Bringing the Art Inside: a Preliminary Analysis of Black Linear Rock-art from Limestone Caves in Erromango,Vanuatu

While surveying and recording rock-art on Erromango over two field-seasons in 1996 and 1997, I had the pleasure of working with Vanuatu Cultural Centre (VCC) fieldworkers Jerry Taki and Sophie Nempan Sei. During this time, both Jerry and Sophie constructed a context of ‘meaning’ for the ‘black linear’ pictures that predominate in the rock-art of the island. Their ideas were highly influential in determining the direction of my research. Jerry spoke of the association of rock-art with warfare and women. Sophie identified certain motifs as clan designs, particularly those located in sites close to where she lives, at Happyland village in the south of the island. The aim of this paper is to understand more about the rock-art of Erromango by combining local knowledge and archaeological techniques of rock-art analysis. I focus on the black linear rock-art, describing its temporal placement and context of production. Temporal information is gleaned from patterns of superimposition among particular rock-art techniques and motif forms, as well as from independent archaeological and ethnographic contexts. It is proposed that black linear rock-art belongs to the most recent period of rock-art production on Erromango, likely within the last 400 years. Rock-art production and use is explored through artistic motifs evident on other items of material culture, including objects which are known, from ethnographic records, to be produced by either women or men. I suggest that black linear motifs were at least in part produced by women, perhaps to register their connection to place during periods of displacement. In accordance with Jerry's statements, ethnographic and archaeological evidence indicates that a salient feature of the island's social landscape over the last 400 years was small and large-scale intra- and inter-island wars. The black linear rock-art is interpreted in relation to this unstable social context.